CODEWITHSUNDEEP
phparrays
Miley2
Miley2

Reputation: 31

PHP - How to position in one array

How to position in one array thanks to one keys known, and to put in a variable all the keys which follow, the first key included ?

My key known : "r"

The key stop : "s"

My array :

['a'] => US
['r'] => UK
['v'] => DE
['s'] => IR     
['k'] => IT    
['o'] => AS

Result = r v

Upvotes: 1

Views: 36

Answers (2)

LF-DevJourney
LF-DevJourney

Reputation: 28529

suppose you s key is behind r, here is the code:

Demo here

$keys = array_keys($array);
$flip_keys = array_flip($keys);
$result = array_slice($keys, $flip_keys['r'], $flip_keys['s'] - $flip_keys['r']);

Upvotes: 2

Paolo
Paolo

Reputation: 15827

You have to parse the full array and check keys are inside the required bounds:

foreach( $theArray as $key => $value )
{
    if( $key >= 'r' && $key < 's' )
    {
        // will enter here with keys 'r' and 'v'

        $theArray[ $key ] = $theNewValue
    }
}

This assuming you want to catch all the values with keys that are alphabetically between "r" and "s" ("s" excluded).

This is not completely clear from your question.

Instead if you want to catch the values between "r" and "s" according to the array order then the codes changes slightly:

$update = false
foreach( $theArray as $key => $value )
{
    if( $key == 'r' )
    {
        $update = true;
    }
    elseif( $key == 's' )
    {
        break;
    }

    if( $update )
    {
        // will enter here with keys 'r' and 'v'

        $theArray[ $key ] = $theNewValue
    }
}

Upvotes: 0

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